210 REPOHtS ON THE STATE OP SCIfiNdE:. 



East End of the Section : — 



Part l.-^TrencK East of the Little Quarry, 



a. ' Hill House Shales ' : — 



Ft. In. 

 a, Sandy shale much disturbed; dip and thickness unknown , . 5 



Probable Fault: — 



b. ' Hill House Grits ' :^ 



h^ Rough, brown, glauconitic grits, flaggy in places and occasionally 

 almost conglomeratic from the presence of inclusions of 



shaley material ; dip 55° P]ast about 12 6 



Ptycho2)aTia (?) sp., and many fragments of Trilobites. 



Part II. — The Hill House Ridge Quarry itself. 



fcj Quartzose grits, almost white, and with little glauconite ; dip 



about 45° East 7 



Jj Dark-brown incoherent grit with trilobite fragments . ..06 

 h^ Brown quartzose glauconite grit 5 



Part III. — Trench West of the Quarry, 



6, Soft dark conglomeratic grit with phosphatic lumps . . . .3 0- 



Jj Greenish quartzose grit ......... 3 



h, Black flaggy grit 6 



&B Dark grits, incoherent in places G 



4.3 



c, ' Hill House Flags ' :— 



c, Black flaggy grit ; dip about 30° to the East 4 



c. Dark sandy and calcareous material with much phosphate . . 1 G 



JJori/pyge sp. 



Paradoxides (J) \ UyoUthus fistula Q), Holl., and Brachiopods 



C3 Black calcareous flaggy grit?, I inch and 3 inches thick ; dip about 



10° to the east. Base not seen 2 



Total thickness seen in section about . .47 



West End of the Section. 



So far as surface features show, the deposit Ijing next below these Hill House 

 Flags appears to be the upward extension of the Quarry Ridge Shales seen in 

 Excavation No. 2, but there is every probability that the junction is a faulted 

 one, and that the sequence is not complete. A trial-hole (No. 17) put down 

 12 yards west of the end of the section near the fence failed to reach solid rock. 



Trial-holes Nos. 14, 15, lU on map (see below, p 241) are in strata which appear 

 to belong to the Hill House Shales, and indicate a considerable thickness of these 

 beds. 



Vertical Excavations or Trial Holes, 



Nos. 8, 9, 11, 17, 18, 19 disclosed no solid rock. 



No. 10, at the top of Dairy Hill, showed brokea grits referable, with 

 doubt, to the Quarry Ridge Grits, with indications of nearly horizontal 

 bedding. 



No. 12 consisted of clearing away aome of the debris in an old quarry 



